/**
 * Created by PanJiaChen on 16/11/18.
 */

/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string | null}
 */
export function parseTime( time, cFormat ) {
    if ( arguments.length === 0 || !time ) {
        return null
    }
    const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
    let date
    if ( typeof time === 'object' ) {
        date = time
    } else {
        if ( ( typeof time === 'string' ) ) {
            if ( ( /^[0-9]+$/.test( time ) ) ) {
                // support "1548221490638"
                time = parseInt( time )
            } else {
                // support safari
                // https://stackoverflow.com/questions/4310953/invalid-date-in-safari
                time = time.replace( new RegExp( /-/gm ), '/' )
            }
        }

        if ( ( typeof time === 'number' ) && ( time.toString().length === 10 ) ) {
            time = time * 1000
        }
        date = new Date( time )
    }
    const formatObj = {
        y: date.getFullYear(),
        m: date.getMonth() + 1,
        d: date.getDate(),
        h: date.getHours(),
        i: date.getMinutes(),
        s: date.getSeconds(),
        a: date.getDay()
    }
    const time_str = format.replace( /{([ymdhisa])+}/g, ( result, key ) => {
        const value = formatObj[ key ]
        // Note: getDay() returns 0 on Sunday
        if ( key === 'a' ) { return [ '日', '一', '二', '三', '四', '五', '六' ][ value ] }
        return value.toString()
            .padStart( 2, '0' )
    } )
    return time_str
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime( time, option ) {
    if ( ( '' + time ).length === 10 ) {
        time = parseInt( time ) * 1000
    } else {
        time = +time
    }
    const d = new Date( time )
    const now = Date.now()

    const diff = ( now - d ) / 1000

    if ( diff < 30 ) {
        return '刚刚'
    } else if ( diff < 3600 ) {
    // less 1 hour
        return Math.ceil( diff / 60 ) + '分钟前'
    } else if ( diff < 3600 * 24 ) {
        return Math.ceil( diff / 3600 ) + '小时前'
    } else if ( diff < 3600 * 24 * 2 ) {
        return '1天前'
    }
    if ( option ) {
        return parseTime( time, option )
    } else {
        return (
            d.getMonth() +
      1 +
      '月' +
      d.getDate() +
      '日' +
      d.getHours() +
      '时' +
      d.getMinutes() +
      '分'
        )
    }
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function getQueryObject( url ) {
    url = url == null ? window.location.href : url
    const search = url.substring( url.lastIndexOf( '?' ) + 1 )
    const obj = {}
    const reg = /([^?&=]+)=([^?&=]*)/g
    search.replace( reg, ( rs, $1, $2 ) => {
        const name = decodeURIComponent( $1 )
        let val = decodeURIComponent( $2 )
        val = String( val )
        obj[ name ] = val
        return rs
    } )
    return obj
}

/**
 * @param {string} input value
 * @returns {number} output value
 */
export function byteLength( str ) {
    // returns the byte length of an utf8 string
    let s = str.length
    for ( var i = str.length - 1; i >= 0; i-- ) {
        const code = str.charCodeAt( i )
        if ( code > 0x7f && code <= 0x7ff ) s++
        else if ( code > 0x7ff && code <= 0xffff ) s += 2
        if ( code >= 0xDC00 && code <= 0xDFFF ) i--
    }
    return s
}

/**
 * @param {Array} actual
 * @returns {Array}
 */
export function cleanArray( actual ) {
    const newArray = []
    for ( let i = 0; i < actual.length; i++ ) {
        if ( actual[ i ] ) {
            newArray.push( actual[ i ] )
        }
    }
    return newArray
}

/**
 * @param {Object} json
 * @returns {Array}
 */
export function param( json ) {
    if ( !json ) return ''
    return cleanArray( Object.keys( json )
        .map( key => {
            if ( json[ key ] === undefined ) return ''
            return encodeURIComponent( key ) + '=' + encodeURIComponent( json[ key ] )
        } ) )
        .join( '&' )
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function param2Obj( url ) {
    const search = decodeURIComponent( url.split( '?' )[ 1 ] )
        .replace( /\+/g, ' ' )
    if ( !search ) {
        return {}
    }
    const obj = {}
    const searchArr = search.split( '&' )
    searchArr.forEach( v => {
        const index = v.indexOf( '=' )
        if ( index !== -1 ) {
            const name = v.substring( 0, index )
            const val = v.substring( index + 1, v.length )
            obj[ name ] = val
        }
    } )
    return obj
}

/**
 * @param {string} val
 * @returns {string}
 */
export function html2Text( val ) {
    const div = document.createElement( 'div' )
    div.innerHTML = val
    return div.textContent || div.innerText
}

/**
 * Merges two objects, giving the last one precedence
 * @param {Object} target
 * @param {(Object|Array)} source
 * @returns {Object}
 */
export function objectMerge( target, source ) {
    if ( typeof target !== 'object' ) {
        target = {}
    }
    if ( Array.isArray( source ) ) {
        return source.slice()
    }
    Object.keys( source )
        .forEach( property => {
            const sourceProperty = source[ property ]
            if ( typeof sourceProperty === 'object' ) {
                target[ property ] = objectMerge( target[ property ], sourceProperty )
            } else {
                target[ property ] = sourceProperty
            }
        } )
    return target
}

/**
 * @param {HTMLElement} element
 * @param {string} className
 */
export function toggleClass( element, className ) {
    if ( !element || !className ) {
        return
    }
    let classString = element.className
    const nameIndex = classString.indexOf( className )
    if ( nameIndex === -1 ) {
        classString += '' + className
    } else {
        classString =
      classString.substr( 0, nameIndex ) +
      classString.substr( nameIndex + className.length )
    }
    element.className = classString
}

/**
 * @param {string} type
 * @returns {Date}
 */
export function getTime( type ) {
    if ( type === 'start' ) {
        return new Date()
            .getTime() - 3600 * 1000 * 24 * 90
    } else {
        return new Date( new Date()
            .toDateString() )
    }
}

/**
 * @param {Function} func
 * @param {number} wait
 * @param {boolean} immediate
 * @return {*}
 */
export function debounce( func, wait, immediate ) {
    let timeout, args, context, timestamp, result

    const later = function() {
    // 据上一次触发时间间隔
        const last = +new Date() - timestamp

        // 上次被包装函数被调用时间间隔 last 小于设定时间间隔 wait
        if ( last < wait && last > 0 ) {
            timeout = setTimeout( later, wait - last )
        } else {
            timeout = null
            // 如果设定为immediate===true，因为开始边界已经调用过了此处无需调用
            if ( !immediate ) {
                result = func.apply( context, args )
                if ( !timeout ) context = args = null
            }
        }
    }

    return function( ...args ) {
        context = this
        timestamp = +new Date()
        const callNow = immediate && !timeout
        // 如果延时不存在，重新设定延时
        if ( !timeout ) timeout = setTimeout( later, wait )
        if ( callNow ) {
            result = func.apply( context, args )
            context = args = null
        }

        return result
    }
}

/**
 * This is just a simple version of deep copy
 * Has a lot of edge cases bug
 * If you want to use a perfect deep copy, use lodash's _.cloneDeep
 * @param {Object} source
 * @returns {Object}
 */
export function deepClone( source ) {
    if ( !source && typeof source !== 'object' ) {
        throw new Error( 'error arguments', 'deepClone' )
    }
    const targetObj = source.constructor === Array ? [] : {}
    Object.keys( source )
        .forEach( keys => {
            if ( source[ keys ] && typeof source[ keys ] === 'object' ) {
                targetObj[ keys ] = deepClone( source[ keys ] )
            } else {
                targetObj[ keys ] = source[ keys ]
            }
        } )
    return targetObj
}

/**
 * @param {Array} arr
 * @returns {Array}
 */
export function uniqueArr( arr ) {
    return Array.from( new Set( arr ) )
}

/**
 * @returns {string}
 */
export function createUniqueString() {
    const timestamp = +new Date() + ''
    const randomNum = parseInt( ( 1 + Math.random() ) * 65536 ) + ''
    return ( +( randomNum + timestamp ) ).toString( 32 )
}

/**
 * Check if an element has a class
 * @param {HTMLElement} elm
 * @param {string} cls
 * @returns {boolean}
 */
export function hasClass( ele, cls ) {
    return !!ele.className.match( new RegExp( '(\\s|^)' + cls + '(\\s|$)' ) )
}

/**
 * Add class to element
 * @param {HTMLElement} elm
 * @param {string} cls
 */
export function addClass( ele, cls ) {
    if ( !hasClass( ele, cls ) ) ele.className += ' ' + cls
}

/**
 * Remove class from element
 * @param {HTMLElement} elm
 * @param {string} cls
 */
export function removeClass( ele, cls ) {
    if ( hasClass( ele, cls ) ) {
        const reg = new RegExp( '(\\s|^)' + cls + '(\\s|$)' )
        ele.className = ele.className.replace( reg, ' ' )
    }
}

/**
 * 对象copy
 * @param json_string
 * @returns {any}
 */
 export function copy( json_string ) {
    return JSON.parse( JSON.stringify( json_string ) );
}

/**
 * 数组合并
 * @param {array} arr1
 * @param {array} arr2
 */
export function array_merge( arr1, arr2 ) {
    var _arr = new Array();
    for ( var i = 0; i < arr1.length; i++ ) {
        _arr.push( arr1[ i ] );
    }
    for ( var i = 0; i < arr2.length; i++ ) {
        var flag = true;
        for ( var j = 0; j < arr1.length; j++ ) {
            if ( arr2[ i ] == arr1[ j ] ) {
                flag = false;
                break;
            }
        }
        if ( flag ) {
            _arr.push( arr2[ i ] );
        }
    }
    return _arr;
}

/**
 * 是否在数组
 * @param target
 * @param arr
 * @returns {boolean}
 */
export function in_array( target, arr ) {
    return arr.includes( target );
}

/**
 * 转换导出json数据
 * @param filterVal
 * @param jsonData
 * @returns {object}
 */
export function export_json( filterVal, jsonData ) {
    return jsonData.map( v => filterVal.map( j => {
        return v[ j ];
    } ) )
}

/**
 * 转换导出json数据
 * @param {Object} filterVal
 * @param {Object} jsonData
 * @param {Object} dataCon
 */
export function export_json_conversion( filterVal, jsonData, dataCon ) {
    return jsonData.map( v => filterVal.map( j => {
        if ( j in dataCon ) {
            return dataCon[ j ].find( item => item.value == v[ j ] ).label;
        } else {
            return v[ j ];
        }
    } ) )
}

/**
 * 转换时间戳
 * @param {string} date
 */
export function strtotime( date ) {
    let time = date ? new Date( date ) : new Date();
    return parseInt( ( time.getTime() / 1000 ).toString()
        .split( '.' )[ 0 ] );
}

/**
 * 获取毫秒时间戳
 */
export function microtime()
{
    return new Date().getTime();
}